First Columbia-class Submarine Stern Delivered - Progress is moving forward on the future USS District of Columbia (SSBN-826), the lead boat of the Columbia-class ballistic missile submarine. This week HII's Newport News Shipbuilding (NNS) announced that it had delivered the stern for the sub by barge from Newport News to Electric Boat's facility in Quonset Point, Rhode Island.

"This is a major milestone in the ramp-up of Columbia-class module production here at NNS," said Brandi Smith, NNS vice president of Columbia -class submarine construction. "Our shipbuilders have worked with pride to accomplish this milestone, and we look forward to continuing our commitment to this important national security program."

NNS is a major shipbuilding partner in the Columbia-class program, constructing and delivering six module sections per submarine under contract to Electric Boat.

Second Most Expensive Pentagon Program

The U.S. Navy will spend around $132 billion for the procurement of the dozen submarines, while the total lifecycle cost for the entire class is estimated at $347 billion. That figure includes all projected costs to develop, buy, and operate the 12 submarines through 2042.

In its Fiscal Year 2019 (FY19) request, U.S. Navy officials asked for $3.7 billion for the Columbia class program – a 97 percent increase over 2018, making it the second-most expensive program in the 2019 Pentagon budget request, next to the Lockheed Martin F-35 Joint Strike Fighter, which is operated by the U.S. Air Force, U.S. Navy and U.S. Marine Corps.

Columbia-Class: Largest U.S. Submarines to Date

The new SSBNs will be the largest submarines ever built by the United States. Each of the planned dozen boats will be 560 feet in length and have a beam of 43 feet.

The Columbia -class will be equipped with sixteen SLBM tubes, as opposed to twenty-four SLBM tubes on Ohio-class SSBNs. That will also reduce construction, operations, and maintenance costs. In addition, the new boats will utilize the joint American-British developed Common Missile Compartment (CMC), which will also be installed on the Royal Navy's new Dreadnought-class submarines. It was designed to launch the Trident II D5 intercontinental ballistic missile (ICBM). The joint effort has been reported to save each nation hundreds of millions of dollars.

The new submarines will be longer, heavier, and feature a complex electric drive propulsion system and associated technology.

Unlike the preceding Ohio-class, the new ballistic missile submarines are being constructed with a life-of-ship reactor, which will result in a shorter mid-life maintenance period, and each was designed to serve a forty-two-year service life.

This will further allow the dozen Columbia-class SSBNs to replace the existing fourteen Ohio-class boats – and reduce overall upfront procurement costs.

The program has also been utilizing techniques that were refined during the construction of the Virginia-class to maximize the efficiency of assembling the complex hulls while meeting a timeline with razor-thin margins.

Columbia-Class: On the Way – But Running Late?

The new Columbia-class is now being constructed by General Dynamic subsidiary Electric Boat for the U.S. Navy in collaboration with NNS.

The defense contractor cut the first steel for the lead boat in May 2019 – while construction of the submarine officially began in October 2020, while on June 4, 2022, Rep. Eleanor Holmes Norton (D-D.C.) declared the keel laid for the future USS District of Columbia (SSBN-826).

It was reported in May that the shipbuilder had not conducted a schedule risk analysis of the lead submarine's construction schedule, an issue that was first identified by the Government Accountability Office (GAO). The D.C.-based watchdog laid out several recommendations to keep the program running on track.

However, another issue was noted by the Congressional Budget Office (CBO) in October 2023 – which found that the program risks running at least 20 percent over budget, or about $20 billion.

"CBO estimates that total shipbuilding costs would average about $34 billion to $36 billion (in 2023 dollars) over the next 30 years, which is about 16 percent more than the Navy estimates. Compared with its estimates for the 2023 plan, CBO's estimates increased by between 5 percent and 10 percent in real (inflation-adjusted) terms, depending on the alternative," the nonpartisan government watchdog group warned.

The United States Navy has designated the Columbia-class its top acquisition priority, as the boats will replace the fleet of again Ohio-class ballistic missile submarines, and take over the role of the nation's sea-based strategic deterrent – seen as the most survivable leg of the nation's strategic triad.

Originally known as the Ohio Replacement Program (ORP) or SSBN(X), until 2016, the lead boat of the class (SSBN-826) will be named to honor the District of Columbia, while the second sub of the class will be named USS Wisconsin (SSBN-827).

Author Experience and Expertise: Peter Suciu 

Peter Suciu is a Michigan-based writer. He has contributed to more than four dozen magazines, newspapers, and websites with over 3,200 published pieces over a twenty-year career in journalism. He regularly writes about military hardware, firearms history, cybersecurity, politics, and international affairs. Peter is also a Contributing Writer for Forbes and Clearance Jobs. You can follow him on Twitter: @PeterSuciu. You can email the author: [email protected]